Combined Risk Index Report for Solomon Islands

Summary Table

Province Mean Rainfall in Driest Quarter (mm) Median Rainfall in Driest Quarter (mm) Std Dev Rainfall in Driest Quarter (mm) Mean Height above Sea Level (m) Median Height above Sea Level (m) Std Dev Height above Sea Level (m) Mean Height above Drainage Network (m) Median Height above Drainage Network (m) Std Dev Height above Drainage Network (m) High Risk Sites (Rainfall) High Risk Sites (Height above Sea Level) High Risk Sites (Height above Drainage Network)
Rennell and Bellona 501 500 21 18 13 19 6 5 5 18 (100.0%) 6 (33.0%) 16 (89.0%)
Temotu 326 0 465 13 11 15 10 8 8 36 (67.0%) 24 (44.0%) 30 (56.0%)
Western 637 719 247 15 10 17 13 10 16 133 (86.0%) 73 (47.0%) 77 (50.0%)
Malaita 560 636 211 62 14 126 28 9 50 343 (100.0%) 121 (35.0%) 173 (50.0%)
Makira-Ulawa 638 710 217 17 11 23 13 8 18 120 (100.0%) 53 (44.0%) 71 (59.0%)
Guadalcanal 354 340 70 36 12 73 14 7 29 167 (100.0%) 70 (42.0%) 100 (60.0%)
Isabel 532 525 69 35 11 91 18 7 40 103 (100.0%) 46 (45.0%) 64 (62.0%)
Honiara 289 288 2 23 18 18 12 11 10 47 (100.0%) 11 (23.0%) 22 (47.0%)
Choiseul 671 736 209 9 7 9 8 6 8 93 (100.0%) 63 (68.0%) 68 (73.0%)
Central 347 347 1 10 7 9 10 7 9 3 (100.0%) 2 (67.0%) 2 (67.0%)
National 530 625 238 35 12 84 18 8 35 1063 (96.0%) 469 (43.0%) 623 (56.0%)

Charts

Mean Rainfall in Driest Quarter by Province
Mean Rainfall in Driest Quarter by Province
Mean Height above Sea Level by Province
Mean Height above Sea Level by Province
Mean Height above Drainage Network by Province
Mean Height above Drainage Network by Province

Combined Risk Index Map

Risk Index Legend

Very High Risk (0.8 - 1.0)

High Risk (0.6 - 0.8)

Moderate Risk (0.4 - 0.6)

Low Risk (0.2 - 0.4)

Very Low Risk (0 - 0.2)

Histograms

Overall Histograms

Overall Histogram of Rainfall in driest quarter
Overall Histogram of Height above sea level
Overall Histogram of Height above drainage network
Overall Histogram of combined_risk_index

Descriptive Statistics

Parameter Mean Median Std Dev High Risk Sites
Rainfall in driest quarter 530 625 238 1063 (96.0%)
Height above sea level 35 12 84 469 (43.0%)
Height above drainage network 18 8 35 623 (56.0%)

Histograms for Rennell and Bellona

Histogram of Rainfall in driest quarter for Rennell and Bellona
Histogram of Height above sea level for Rennell and Bellona
Histogram of Height above drainage network for Rennell and Bellona
Histogram of combined_risk_index for Rennell and Bellona

Descriptive Statistics

Parameter Mean Median Std Dev High Risk Sites
Rainfall in driest quarter 501 500 21 18 (100.0%)
Height above sea level 18 13 19 6 (33.0%)
Height above drainage network 6 5 5 16 (89.0%)

Histograms for Temotu

Histogram of Rainfall in driest quarter for Temotu
Histogram of Height above sea level for Temotu
Histogram of Height above drainage network for Temotu
Histogram of combined_risk_index for Temotu

Descriptive Statistics

Parameter Mean Median Std Dev High Risk Sites
Rainfall in driest quarter 326 0 465 36 (67.0%)
Height above sea level 13 11 15 24 (44.0%)
Height above drainage network 10 8 8 30 (56.0%)

Histograms for Western

Histogram of Rainfall in driest quarter for Western
Histogram of Height above sea level for Western
Histogram of Height above drainage network for Western
Histogram of combined_risk_index for Western

Descriptive Statistics

Parameter Mean Median Std Dev High Risk Sites
Rainfall in driest quarter 637 719 247 133 (86.0%)
Height above sea level 15 10 17 73 (47.0%)
Height above drainage network 13 10 16 77 (50.0%)

Histograms for Malaita

Histogram of Rainfall in driest quarter for Malaita
Histogram of Height above sea level for Malaita
Histogram of Height above drainage network for Malaita
Histogram of combined_risk_index for Malaita

Descriptive Statistics

Parameter Mean Median Std Dev High Risk Sites
Rainfall in driest quarter 560 636 211 343 (100.0%)
Height above sea level 62 14 126 121 (35.0%)
Height above drainage network 28 9 50 173 (50.0%)

Histograms for Makira-Ulawa

Histogram of Rainfall in driest quarter for Makira-Ulawa
Histogram of Height above sea level for Makira-Ulawa
Histogram of Height above drainage network for Makira-Ulawa
Histogram of combined_risk_index for Makira-Ulawa

Descriptive Statistics

Parameter Mean Median Std Dev High Risk Sites
Rainfall in driest quarter 638 710 217 120 (100.0%)
Height above sea level 17 11 23 53 (44.0%)
Height above drainage network 13 8 18 71 (59.0%)

Histograms for Guadalcanal

Histogram of Rainfall in driest quarter for Guadalcanal
Histogram of Height above sea level for Guadalcanal
Histogram of Height above drainage network for Guadalcanal
Histogram of combined_risk_index for Guadalcanal

Descriptive Statistics

Parameter Mean Median Std Dev High Risk Sites
Rainfall in driest quarter 354 340 70 167 (100.0%)
Height above sea level 36 12 73 70 (42.0%)
Height above drainage network 14 7 29 100 (60.0%)

Histograms for Isabel

Histogram of Rainfall in driest quarter for Isabel
Histogram of Height above sea level for Isabel
Histogram of Height above drainage network for Isabel
Histogram of combined_risk_index for Isabel

Descriptive Statistics

Parameter Mean Median Std Dev High Risk Sites
Rainfall in driest quarter 532 525 69 103 (100.0%)
Height above sea level 35 11 91 46 (45.0%)
Height above drainage network 18 7 40 64 (62.0%)

Histograms for Honiara

Histogram of Rainfall in driest quarter for Honiara
Histogram of Height above sea level for Honiara
Histogram of Height above drainage network for Honiara
Histogram of combined_risk_index for Honiara

Descriptive Statistics

Parameter Mean Median Std Dev High Risk Sites
Rainfall in driest quarter 289 288 2 47 (100.0%)
Height above sea level 23 18 18 11 (23.0%)
Height above drainage network 12 11 10 22 (47.0%)

Histograms for Choiseul

Histogram of Rainfall in driest quarter for Choiseul
Histogram of Height above sea level for Choiseul
Histogram of Height above drainage network for Choiseul
Histogram of combined_risk_index for Choiseul

Descriptive Statistics

Parameter Mean Median Std Dev High Risk Sites
Rainfall in driest quarter 671 736 209 93 (100.0%)
Height above sea level 9 7 9 63 (68.0%)
Height above drainage network 8 6 8 68 (73.0%)

Histograms for Central

Histogram of Rainfall in driest quarter for Central
Histogram of Height above sea level for Central
Histogram of Height above drainage network for Central
Histogram of combined_risk_index for Central

Descriptive Statistics

Parameter Mean Median Std Dev High Risk Sites
Rainfall in driest quarter 347 347 1 3 (100.0%)
Height above sea level 10 7 9 2 (67.0%)
Height above drainage network 10 7 9 2 (67.0%)

Methodology